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 A362761 Number of nonisomorphic unordered triples of derangements of an n-set. 2
 1, 0, 1, 2, 18, 138, 4642, 211600, 13511246, 1092862024, 109276859229, 13221974420985, 1903936637405380, 321762396855180477, 63065061524052355523, 14189582409276961769144, 3632522968870016652531332, 1049797035002712952582167891, 340133739324533632977813192678 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,4 COMMENTS Isomorphism is up to permutation of the elements of the n-set. LINKS Andrew Howroyd, Table of n, a(n) for n = 0..50 EXAMPLE The a(3) = 2 nonisomorphic triples of derangements are: {(123), (123), (123)}, {(123), (123), (132)}. CROSSREFS Column k=3 of A362759. Cf. A362646, A362760. Sequence in context: A073512 A005544 A154636 * A216584 A193446 A226733 Adjacent sequences: A362758 A362759 A362760 * A362762 A362763 A362764 KEYWORD nonn AUTHOR Andrew Howroyd, May 02 2023 STATUS approved

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Last modified September 17 05:28 EDT 2024. Contains 375985 sequences. (Running on oeis4.)